How to change DateTime format in route in ASP.Net Core?

Question

I'm using datetime in Route attribute like that:

[Route("{givenDate:datetime}")]

but it's in "American" format which is "month-day-year".

How can I convert it to "day-month-year" format?

PS. I'm aware that I can use other formats like "yearmonthday" or "year-month-day", but "day-month-year" looks more intuitive for me.

Possible duplicate of stackoverflow.com/questions/919244/… question. — AndrasCsanyi
– AndrasCsanyi, Commented Oct 24, 2018 at 7:40
I don't think so. I know to change DateTime formats, but i don't know how to set this in Route attribute :) — Morasiu
– Morasiu, Commented Oct 24, 2018 at 7:44
It doesn't look like you can change the datetime constraint: See the docs, notably the warning at the bottom of the linked section. — Kirk Larkin
– Kirk Larkin, Commented Oct 24, 2018 at 7:47

Chris Pratt · Accepted Answer · 2018-10-24 16:27:09Z

3

You could instead use a route like:

[Route("{day:regex(^[[0-2]][[0-9]]|3[[0-1]]$)}-{month:regex(^0[[0-9]]|1[[0-2]]$)}-{year:regex(^\\d{{4}}$)}")]

And then change your action to something like:

public IActionResult Foo(int day, int month, int year)
{
    var givenDate = new DateTime(year, month, day);

    ...
}

Admittedly, that kind of sucks, but it does get the job done. The regex constraints, while ugly as hell, will ensure that ultimately any values that get through will work to construct a DateTime object with.

answered Oct 24, 2018 at 16:27

Chris Pratt

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